Cleaning The Brewer Filter Screen - VKI Technologies Zuma Brewer Operation And Service Manual

Cleaning the Brewer Filter Screen

Over time, coffee oils and fine grounds (the size of dust particles), as well as minerals in the water will
accumulate on the brewer filter screen. This accumulation will decrease the porosity of the screen, making it
difficult for the liquid to flow through, resulting in brewer flooding. The Zuma brewer screen must be kept
clean to prevent this from occurring.
Soak the filter screen(s) in a solution of water and dishwashing liquid for a few minutes to start
breaking down the coffee oils on the screen(s).
Rinse the filter screen(s) thoroughly with fresh warm water.
Soak the filter screen(s) in a non-diluted solution of VKI-approved Block Whitener (VKI p/n -
M039033S) overnight - approximately 8-12 hours.
Under full tap pressure, rinse the filter screen(s) thoroughly over their entire surface with fresh
warm water. Ensure that water passes through the filter with little resistance. Once done, allow
the screen(s) to dry and store them in their box until they are needed.
WARNINGS:
Follow all of the manufacturer's safety instructions found on the product label.
Never mix different types of cleaners together - this can be extremely dangerous.
Do not use products other than the VKI-approved cleaners. Thorough testing was performed using
these approved cleaners, ensuring that they are non-toxic and that they do not damage the brewer.
NOTES:
•
Several screens can be soaked at the same time when cleaning them.
•
Used Block Whitener can be stored and re-used several times before it needs to be discarded. When
its cleaning action decreases and the screens do not become as white, discard the used Block
Whitener (in accordance with local regulations).
•
Clean screens should be stored in their original protective packaging.
•
Screens that have become loose from their frame, or screens that are torn should be discarded and
must never re-used. Torn filter screens will allow coffee grounds to get into the brewer cylinder, which
in turn will score the cylinder walls and the Teflon seal, resulting in loss of vacuum. When this occurs,
the brewer cylinder and the Teflon seal will both need to be replaced.
Zuma Brewer - Operation & Service Guide
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